Okay I have a 2003 Grand Marquis i have been putting together. I put an LX Crown Vic floor shifter in with the center console some p71 police seats not trying to clone it to look like a Marauder. just want a Grand Marquis with a floor shifter and some upgrades my question is this I had a guy Fab me some adapter plates that will allow the Mercury Marauder intake manifold to fit a navigator so the other question would be this will the Lincoln Navigator engine fit physically if not what would need to be changed? When it comes to wire harness that's not a problem I make that all work. I know it'll fit the transmission and motor mounts. Any info and criticism will be appreciate it thanks.